July is the hottest month in Boston with an average temperature of 24°C (74°F) and the coldest is January at -1°C (29°F) with the most daily sunshine hours at 10 in July. The wettest month is April with an average of 100mm of rain. The best month to swim in the sea is in August when the average sea temperature is 20°C (68°F).
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Sunrise 06:26
Sunset 16:29
Sunrise 06:26
Sunset 16:29